Show Double Corn Yield By Soil Management Illinois Tests Prove Value of New NevI Methods Farmers can double the present 50 per bushel-per-acre state average corn yields through good soil management management man man- nt declares Prof A A. A L. L Lang University of Illinois Corn yields above bushels per acre are repeatedly harvested by research research research re re- re- re search workers from high fertility plots at the experiment stations At Illinois Lang points out the high fertility plots have averaged above bushels since the use of hybrid seed The No 1 problem in getting these high yields is the rebuilding of the organic matter supply of the soils Years of soil mining have run down this supply even on thI the th I rich black soil of the state In addition addition addition ad ad- the soil supply of phosphorus and potash vital to the growth of legumes is badly depleted in most Corn Belt soils Lang outlines four steps toward rebuilding the soil 1 Test your soil to determine the thene ne needs ds for lime and plant food 2 Use of lime and fertilizers according according according ac ac- ac- ac cording to test to build the fertility level for the growth of legumes in inthe inthe inthe the rotation 3 Use of rooted deep-rooted legumes crop residues and manure to rebuild the organic matter supply This organic organic organic or or- ganic matter will help aerate the soil and furnish the bulk of the nitrogen nitro nitro- ge gen gep needed for crop rotation 4 Supplementing the increased fertility of the soils with fertilizers carrying nitrogen phosphorus and potash to permit the raising of bushel corn crops |